﻿PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



SMITHSONIAN INSTITUTION 



U. S. NATIONAL MUSEUM 



Vol. 100 Washington: 1949 No. 3255 



OBSERVATIONS ON FLATWORMS AND NEMERTEANS 

 COLLECTED AT BEAUFORT, N. C. 



By A, S. Pearse 



During the summer of 1946, from May 23 to August 27, I studied 

 tlie consortes of marine animals collected at Beaufort, N. C. This 

 paper discusses the findings for turbellarians, trematodes, and nemer- 

 teans. The cestodes and nematodes will be worked up and presented 

 later; those that deal with parasitic crustaceans have already been 

 published (Pearse, 1947). 



Three turbellarians, 32 trematodes, and 2 nemerteans that were 

 found on or in marine animals at Beaufort, N. C, are here listed, 

 and eight new species of trematodes and one new genus are described. 

 The species of hosts that were found to be infested with parasites 

 were 1 king crab, 3 decapod crustaceans, 2 clams, 1 turtle, and 28 fishes. 

 Twenty-two species of fishes harbored one species of trematode, five 

 had two, and one had three. 



Thanks are due to L. B. Hayes, David Busby, and Glen E. Mathisen, 

 who helped with routine examinations. All animals were dissected 

 and studied under a binocular microscope. Any consortes found were 

 preserved and mounted in dammar. Dr. E. W. Price looked over the 

 manuscript of this paper and made many constructive suggestions 

 in regard to the Monogenea. My heart}' thanks are tendered to him. 



Phylum PLATYHELMINTHES 



Class TURBELLARIA 

 Order Tricladida 



BDELLOURA CANDIDA (Girard) 



On June 27 four specimens of Limulus polyphemus Linnaeus (2 

 males and 2 females) were brought into the laboratory; they carried, 



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